Rectangular Footing Design | Numerical | Rectangular design problem | isolated rectangular footing

[@ojaswinikammili7489]

best channel in the KZbin for structural engineers thank you sir

[@magibooni875]

Hi sir this is my first comment in YT ..great explanation I'm a recent subscriber..all video's r very clear ..in footing series kindly do a numerical on combined footing ..thank you

[@structuralanalysisanddesign]

So nice of you, thanks for appreciating my work, support my channel with your friends, combined footing soon i will upload

[@vasachisenjubean5944]

*THANKS A LOT SIR, I WAS WAITING EAGERLY FOR THIS VIDEO*

[@structuralanalysisanddesign]

This was specially done for you which you had requested, keep supporting and loving like this and share with your friends

[@vasachisenjubean5944]

@@structuralanalysisanddesign Thank you and stay safe

[@structuralanalysisanddesign]

You too stay safe, next will be coming up with center line method to find out the quantities

[@halalmeatshophk]

@@structuralanalysisanddesign Sir, at 24:50 you did a mistake. 1155 divide by 113 is 10.2 bars, but u answered 12.36 bars. why? if 10 bars is right, then it is under reinforced, right ? how come the calculation method is wrong ?

[@brigadeshivu]

S correct

[@ankitdubey4949]

Nice work man Well done Clearly explained

[@structuralanalysisanddesign]

Glad you liked it! All the best

[@ShivKumar-qw8nd]

Nice way of teaching

[@structuralanalysisanddesign]

Thanks for liking, keep watching and sharing

[@dannycbe949]

Good explanation. You could think of providing a reinforced pedestal to reduce the impact of shear.

[@civilexplorer7038]

Sir, U explained it very well😍. #Best

[@structuralanalysisanddesign]

Thank you so much, all the best, keep watching and keep supporting us

[@gowsiraj2076]

Good and neat explanation.... Thank you sir

[@structuralanalysisanddesign]

So nice of you, keep watching

[@gowsiraj2076]

@@structuralanalysisanddesign Many thanks to you for clear teaching and explanations about formula derivations... Please do more videos sir☺

[@structuralanalysisanddesign]

Sure will try to come up with more videos soon

[@nibhabhartee19]

sir for calculating Po we use column load only but here you used the total load.Why?

[@PraveenKumar-vy4py]

Sir also add a video with design of singly and doubly reinforcement beam. Along with what is balanced reinforcement over reinforcement and under reinforcement section with the graf

[@structuralanalysisanddesign]

Hello Praveen, Design of Singly reinforced beam already i have uploaded and also what is meant by balanced, under reinforced and over reinforced sections, please see the playlist in my channel "RCC", if you dont find it leave here one message il give the link. Design of Doubly reinforced beam i will do soon

[@engineermohammedsoyebbadgu3714]

It is design only by Column Load or Reaction... How To We Design If there are also Some Bending force is come during Analysis... Like Pu 600 KN Mx 10 KNm My 25 KNm Thanks for your Explanation Superb 😊😊

[@rohitsahu5845]

Everyone skip this in rectangular footing area of reinforcement should be calculated two times .i see your video just to verify that

[@Jaydev-oj2hx]

Sir, Is it mandatory to provide same diameter bars along both directions or can we use lesser diameter bars(say, 10mm bars) for Ast2?

[@structuralanalysisanddesign]

We can use different diameters

[@suraj__710]

sir do we have to show how the BM at XX equation comes or just write the equation only

[@deenkibaatein4778]

Hi Bro can you please explain the shoe footing which is eccentric footing where column at edge side.

[@earthlover449]

Sir from which IS code you take formula for area of reinforcement. Different KZbin channels are writing different formulas for area of reinforcement. Please explain

[@structuralanalysisanddesign]

Its a simplified formula derived from IS 456, you can use it you will get same answers

[@earthlover449]

@@structuralanalysisanddesign ok sir thank you

[@bhaskarak4409]

Bro vertical load lo live load tesukunty same procedure y na bro

[@chinmoy_ce_135]

Sir if moment are given in the question on shorter side and longer side then how to calculate

[@Mutant707]

cant u make a dedidated vedio on patterns for all types of structures

[@Hariprasad-io3rl]

Sir I think u have to take ultimate load as 600kn itself Then we will get net pressure as 100kn/m2

[@veeramoorthy1000]

Very nice sir. Can u tell nice self understanding easy text book

[@mauliktala7427]

Sir please upload eccentric footing or corner footing design... it's also much importance now a days

[@structuralanalysisanddesign]

Ya i will be coming up with those videos also, stay tuned for more civil engineering videos, check out my patreon profile

[@PraveenKumar-vy4py]

@@structuralanalysisanddesign sir where is this patreon profile

[@structuralanalysisanddesign]

its just like youtube

[@sonukumar-bp4wb]

Sir please make a video series on g+2 building structure .I am waiting for a building design . Thanks #abhijeet sir

[@abdulzahiraliyi8675]

do we have to provide As1 in the shorter direction? do we have to always use the BOTTOM Reinforcement %(As1) while calculating for concrete shear in 1way shear check?

[@suraj__710]

sir in check for 1 way shear we concluded it as not safe , is it because Tv and Tc value are real close .If Tv = 0.35 and Tc=0.328 then it will be safe , isnt it sir , as there is a good difference here

[@murthy2207]

sir, Ast-2 u have not followed clear spacing rule mentioned in table-15 of IS;456. for 415 steel clear spacing should not be more than 180mm. correct me if I'm wrong.

[@structuralanalysisanddesign]

Check out page number 66 of IS 456-2000, clause 34.5.1, it says as per solid slabs we have to follow and table 15 is for beams, clause 26.3.3 in slabs it says 3 times effective depth or 300mm whichever is smaller. I hope i cleared you doubt, thanks for watching

[@murthy2207]

@@structuralanalysisanddesign Yes sir, cleared. Thank you. sir plz teach us edge column footing .... No YT channel did that.

[@structuralanalysisanddesign]

Definitely i will try to work out that problem

[@murthy2207]

@@structuralanalysisanddesign sir, for Ast-2 , pt value is less than o.12%. in that case what to do? should provide minimum %?

[@thecivilboyverma1430]

kzbin.info/www/bejne/gnWTZHmcrrmoZ7c

[@priyabrataghosh9309]

Sir,for net upward pressure of soil,in some books, they took the live load instead of adding 10% of it for calculating the value,here you add 10% with live load for calculating... now I'm confused sir... please reply

[@structuralanalysisanddesign]

You can go with the steps shown in video.

[@hs.markandeyahonnalisiddap5534]

Equal projectons beyond the coloumn are allowed for the design

[@sudarshannikam5243]

Thanks sir for this explanation, Sir which bar should be at bottom or top (for footing jali) .Should short bars be at bottom side and long bars should be above short bars? Is it mandatory ? Position of long bar and short bar depend on depth d and d1. It always depending on sequence of calculation of Ast1 and Ast2. Is it mandatory that As1 should be calculated by max BM (M1u) and Ast2 should be calculated by low value of BM (M2u). Because sequence of calculation of Ast1 and Ast2 decides the position of upper side or lower side of bars due to depth d and d1 . Can we calculate As1 by M2u and As2 by M1u vice versa. In footing reinforcement schedule there is no provision of showing Max BM and sequence of Ast1 and Ast2 calculation then how to decide laying position of short bar or long bar (above or below for same jali as a long bar and short bar) ? Please explain sir.

[@madhusudhan8583]

Sir, τv =Nominal shear stress 0.33 N/mm² is Greater than, τc=Design shear stress 0.328N/mm² . Hence it is safe in One way shear. This is been explained in your previous rectangular footing design video.

[@kritikaprakashsharma5419]

I have also doubt in this part plz sir clear it

[@earthlover449]

Sir in Ast-1 , % of steel value is coming 0.021. but you worte 0.21. where as 0.021 is less than the required min percentage of steel of 0.12%. please correct me if iam wrong.

[@jessicac6015]

Hello, could you explain where the M1u= 0.138FckBd^2 comes from?

[@jessicac6015]

Its in 15.20

[@structuralanalysisanddesign]

Hello Jessica, it is the modified formula of Mulim which is given on Page 96 of IS 456-2000 (G 1.1 (c) Formula) i have substituted (Xumax/d) value and got 0.138Fckbd^d and remember its valid only for Fe415. for Fe 250 and Fe 500 (Xumax/d) is different so you get different Mu value. I hope i cleared your doubt, keep watching and keep sharing

[@jessicac6015]

@@structuralanalysisanddesign Thank you! Your videos are very informative :)

[@rithikavidhu5700]

hi sir for ast2 did u take d1^2?

[@bheemaabhinav7941]

Pls explain about flat slabs design

[@arbeenbaba123]

Sir make a vedio on combined trapezoidal footing for 02 columns

[@Abc-wb2kk]

Sir i think you forget to put periphery value in last Two way shear Tv value ... formula is Load/periphery you only took load / Area of punching shear.

[@UjjwalKumar-]

Sir , I have Doubt in 7:45 W is equal to Load Given sir , But Why you took 660 , we should take 600 na Sir . Pls Tell me as soon as possible

[@akhilsurendran3905]

660 is 600 + 10% of 600

[@kwalicks]

but as per is code depth is governed my shear only, for safe design of footing.... so how is it possible to adopt depth by calculating moment

[@brigadeshivu]

Then how to calculate Ast without moment we have to assume Ast and then proceed for depth by shear

[@suraj__710]

sir whats the name to be written for Vx andVux

[@prabhatrijal]

Thank you sir..... Sir, it would be so great if you could make a video of design of eccentric loading footing too.

[@structuralanalysisanddesign]

Your request Noted, keep watching and checkout channel membership feature

[@prabhatrijal]

@@structuralanalysisanddesign ok sir

[@bagguviswanadh8036]

And from which code book u took ast formula please let me know

[@structuralanalysisanddesign]

Its a modified version of code book formula, in any standard text book you can find that Ast formula

[@kamalbajagain2579]

neelam sharma

[@mohamednaseer9167]

For area of steel reinforcement Ast1 I think u made a mistake ... in the root of the formula it is Bd²... so it should be 400² which is equal to 160,000.. can u please clarify if I am wrong

[@structuralanalysisanddesign]

Yes my dear student its BdSqaure and 400square, by mistake i have written only 400 but the answer is correct its done by taking 400sqaure

[@johnnytun471]

He calculated with 400 square, he just forgot to put square sign in formular you can check his calculation is correct.

[@ministryofgirls_]

Take only axial load while u r calculating soil pressure due to column load not total load sir

[@mirwaisoriakhel7419]

its wrong 1/2(L-a) its OK 1/2(L-1/2a) please chick this in Geometry. and your explanation very good. thanks.

[@structuralanalysisanddesign]

Thanks for the appreciation, ok i will check the geometry

[@arbaazmirza5084]

Please mention which codes used ???? In all ur videos...

[@garrixergaming692]

Example from RCC BC Punmia 🤩🤩

[@vijaybhasker2928]

sir please make a video oncombined footing

[@structuralanalysisanddesign]

Yes vijay working on it, will be coming up with detailed video

[@vijaybhasker2928]

@@structuralanalysisanddesign thank you so much for your concern sir. i respect you alot. because you made me to understand subject easily. and seriously no faculty had gave clear lecture than you

[@vijaybhasker2928]

@@structuralanalysisanddesign but sir, i have little bit of confusion while taking sections in rectangular footing design. please give me clearance about it

[@vijaybhasker2928]

@@structuralanalysisanddesign thank you sir, please take care

[@rohitarya7512]

Sir, upward pressure mai to =load on column to total area lai tai hai na Sir aap total load to total area lai liyai hai, Sir, if i am wrong then help me sir

[@vijaybhasker2928]

sir, why dont you consider footing design biaxial moments i.e, "mx "and "my" ?

[@uttaranplotter5997]

Sir, well presentation. Ast1 > 0.12% but Ast2

[@sangavaimkulanthaivelu8217]

Sir, can you reply for this question?

[@civilstruct4053]

sir how u are taking b/L ratio as 40/60 ,is it practicle ????

[@kinlleygyamtshookh209]

sir ... if you could solve a problems on raft footing...

[@mariyamir2000]

At 40:06 how do we calculate the value of Fu? Plz explain

[@earthlover449]

You can see the calculation of Fu at 39:30

[@rohitsahu5845]

Best bro

[@sangavaimkulanthaivelu8217]

If ast1

[@vkchowdary7924]

In Area Calculations why take B/L = 40/60 This ratio will be taken from column dimensions ?

[@kamalbajagain2579]

yes

[@vijaybhasker2928]

sir kindly upload design of combined footing

[@bholasontakke]

Please take problem on combined footing

[@khajaazammohiuddin5105]

Now a days using fe 500 and 550 How we design what is formulas

[@amansah9354]

sir can u pls upload the eccentric footing design ...

[@bajisaidavalishaik5670]

What if they given bi axial load in question?

[@Civilzone975]

Sir I have problem in SFD and BMD of frame structure ☹️☹️☹️☹️

[@rajivprajapati7458]

Why you don't check minimum reinforcement in case of ast2.

[@thecivilboyverma1430]

kzbin.info/www/bejne/gnWTZHmcrrmoZ7c

[@raheelfaraz3040]

Sir my quedtions 1)is this a confirmed question from 5th unit 2)i can do same method for scoring 3)sir due to covid it caries 14 marks 4) please reply 4

[@imazuddinzoha4260]

fck means=? Is it ultimate compressive strees??? sir plz reply

[@structuralanalysisanddesign]

fck is compressive strength of concrete

[@imazuddinzoha4260]

@@structuralanalysisanddesignultimate or allowable? In Bangladesh, we use f'

[@thecivilboyverma1430]

Compressive stress of concrete

[@bagguviswanadh8036]

Sir ast1 u in place of dsqure u give n d means instead of 400*400 u given 400

[@vjyvncnt]

Foundation size if we make same size we get less rft moment will reduce Make 4 side same size for construction

[@katilnikki7104]

Cant we calculate moment with cantilever formula?

[@vikasreddy2562]

Sir, why u considered b/l = 40/60

[@K1M01]

Column

[@K1M01]

400/600

[@amitsaha2537]

for net upward pressure , isnt it we should use factored load?? like 1.5*600

[@structuralanalysisanddesign]

Hello amit, i have not incorporated factored load while calculating upward pressure but if you watch carefully complete video i have factored moment by mutiplying 1.5, its usual practice to use safety factor for moment instead of load

[@bagguviswanadh8036]

I need circler footing problem

[@structuralanalysisanddesign]

I will surely try to upload, right now i am focusing on columns

[@bagguviswanadh8036]

@@structuralanalysisanddesign OK sir

[@panchalchintan9689]

Can anyone tell me about B/L ratio where this came from🤔

[@bhanusairamoju1128]

It should be (T suffix v) < (T suffix c) In one way shear

[@gixerriders1993]

Are you same from Build it home channel ? Am I right ?

[@structuralanalysisanddesign]

No Madhvendra, This is my first channel

[@gixerriders1993]

@@structuralanalysisanddesign don't mind pls thank you your all solutions are so unique & useful for exams ......

[@structuralanalysisanddesign]

I am very happy that my videos are useful for you, this motivates me to come up with more videos, keep supporting and sharing these lectures to your civil engineering friends

[@kartikshettar2050]

Sir staircase problems upload

[@aayushrjl]

Sir next time please use X-X section in X axis and Y-Y section in Y axis , its really confusing

[@structuralanalysisanddesign]

It depends upon you aayushrjl but still i will consider your suggestion, thanks for watching

[@monishabalu622]

Sir, how to calculate the bending moment in square footing for rectangular column ?

[@praveenmotovlogger98]

Consider critical section length i.e (L-a/2) and BM for cantilever is WL^2/2... Finaly u wil get Wu(L-a)^2/8

[@everthinghere3750]

@@praveenmotovlogger98 hi Darla

[@vjyvncnt]

B.m =po.B*L/8(B-b)^2 But my doubt is how two way shear check for a rectanglurar column squre footing

[@UjjwalKumar-]

Pu = P/A ( 600/6) = 100Kn/m²

[@arifshaik711]

why you are not using this formula for Ast calculation Mu=0.87 x fy x Ast d {1-(Ast*fy/(bd*fck))}

[@structuralanalysisanddesign]

I dont use that formula because it becomes tedious to follow that formula, the modified version of Ast formula which i use is very easy to use and apply, please refer Limit State Design of Reinforced Concrete by B.C.Punmia for that theory how the formula is modified, i recommend to use modified version for simplicity, however both formula gives same Ast.

[@arifshaik711]

Tq so much sir for giving clarity, I did one footing design with reference of your video that is sq footing and rectangle column I'll send it Plz check sir.....

[@structuralanalysisanddesign]

sure

[@amritkumarbehera7748]

How d= 0.4???

[@georgen9755]

hand writing not in compliance

[@tarun8741]

Ast 2 is wrong answer sir

[@dheerajkhanal7251]

circular footing bolo sir. voh kohi thik sey nahi bolrey. plze explain that.

[@kids-nv7et]

design safe eddida mad ri sir 😢😢

[@tejavajrala7190]

Wrong solution..B value is taken wrong. At Vx it is raken as 2000 and at Tv it is taken as 3000..ive wasted my time looking at this video. Observe from 29th minute. DISAPPOINTED.

[@structuralanalysisanddesign]

Solution is not wrong, at 33:22 i have corrected as 2000, while writing i made mistake but value calculated is correct